HP "sought to take advantage of customers' sunk costs," printer owners claimed this week in a class action lawsuit against the hardware giant. Lawyers representing the aggrieved were responding [PDF] in an Illinois court to an earlier HP Inc motion to dismiss a January lawsuit. Among other things, the plaintiffs' filing stated that the printer buyers "never entered into any contractual agreement to buy only HP-branded ink prior to receiving the firmware updates." They allege HP broke several ant...